397487805 has 32 divisors (see below), whose sum is σ = 747169920. Its totient is φ = 177895680.

The previous prime is 397487767. The next prime is 397487813. The reversal of 397487805 is 508784793.

It is not a de Polignac number, because 397487805 - 2⁷ = 397487677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90510 + ... + 94799.

It is an arithmetic number, because the mean of its divisors is an integer number (23349060).

Almost surely, 2^397487805 is an apocalyptic number.

It is an amenable number.

397487805 is a deficient number, since it is larger than the sum of its proper divisors (349682115).

397487805 is a wasteful number, since it uses less digits than its factorization.

397487805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185341.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The square root of 397487805 is about 19937.0962028075. The cubic root of 397487805 is about 735.2605582757.

The spelling of 397487805 in words is "three hundred ninety-seven million, four hundred eighty-seven thousand, eight hundred five".